Take My Ex-Wife, Please - S4.E17

Alex runs into his ex-wife, Phyllis, eating alone at a restaurant, and when she tries to reach out to him, he gently tells her he's not interested. Nonetheless, Phyllis shows the next day at the garage to find Alex, but he's out driving. Louie manages to arrange a date with Phyllis, who is particularly vulnerable, having just gone through a divorce. When Alex learns of this (after Louie tries to rub it in), Alex becomes concerned about the depths that Phyllis has sunk to and goes to her hotel to talk. Too late- Louie has already arrived and has already tried to seduce Phyllis, much to her disgust. Alex then takes Phyllis out to dinner, leaving Louie naked in Phyllis' hotel room.